Fraction Calculator

Add, subtract, multiply, divide & simplify

Fraction Arithmetic
Simplify a Fraction
Fraction ↔ Decimal Chart
FractionDecimalFractionDecimal
1/20.53/80.375
1/30.33335/80.625
2/30.66677/80.875
1/40.251/100.1
3/40.751/160.0625
1/50.23/160.1875
2/50.45/160.3125
3/50.67/160.4375
4/50.89/160.5625
1/60.166711/160.6875
5/60.833313/160.8125
1/80.12515/160.9375
Sixteenths are common in inch measurements (tools & lumber).
FAQ
How do I add fractions?
Convert to a common denominator (the LCM of both denominators), then add the numerators. Example: 1/2 + 1/3 = 3/6 + 2/6 = 5/6.
How do I simplify a fraction?
Divide numerator and denominator by their greatest common factor. Example: 12/18 has GCF 6, so it reduces to 2/3.
How do I turn a mixed number into an improper fraction?
Multiply the whole part by the denominator and add the numerator: 2 3/4 = (2Γ—4+3)/4 = 11/4. The calculator does this automatically.
How do I convert a fraction to a decimal?
Divide the numerator by the denominator: 3/8 = 0.375. Results include the decimal, and the chart below lists common values.
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How this fraction calculator works

Enter two fractions, pick an operation, and it finds the common denominator, computes, and reduces to lowest terms β€” showing the result as a proper/mixed fraction and a decimal. Use the whole-number box for mixed numbers like 1 2/3. The simplifier below also shows which common factor was divided out.

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